LDHA and neoplasm: To determine if there are changes in the primary metabolic enzyme LDHA that might correlate with the changes in lactate levels, immunoblot analysis using whole tumor homogenates of U251, NSC11 and GBMJ1 orthotopic tumors harvested at 0, 6, 16 and 24 h after 6‐Gy irradiation or at the same time period after 0‐Gy sham irradiation, were performed.